Download or read book MAC Protocol Design in Full Duplex Enabled Wireless Networks written by Liqun Fu and published by Springer Nature. This book was released on with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MAC Design and Analysis for MU MIMO and Full duplex Enabled Wireless Networks written by Ruizhi Liao and published by . This book was released on 2014 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les xarxes sense fils basades en l'estàndard IEEE 802.11, sobretot aquelles que funcionen en mode infraestructura, conegudes com a xarxes WLAN o Wi-Fi, han tingut molt d'èxit i s'han convertit en una part indispensable de la nostra vida tant a les llars com als llocs de treball. No obstant això, el ràpid creixement dels dispositius sense fils, i un canvi d'hàbits dels usuaris des de la navegació web cap a una àmplia varietat d'aplicacions que requereixen un gran ample de banda (per exemple, vídeo d'alta definició, les xarxes socials o la càrrega de continguts al núvol), han fet que les WLAN d'avui en dia tinguin un baix rendiment. La pròxima generació de WLANs, basades en el nou estàndard IEEE 802.11ac, respon a aquests reptes mitjançant la introducció d'una sèrie de novetats a nivell físic (PHY) i a nivell d'accés al medi (MAC), incloent l'enllaç de baixada Multi-user Multiple-Input Multiple-Output (MU-MIMO), un nou esquema de modulació i codificació, canals amb major amplada de banda i l'agregació de trames. Entre ells, l'enllaç de baixada MU-MIMO és una de les novetats més importants per a millorar significativament el rendiment de les xarxes WLAN, ja que permet que el punt d'accés (AP) pugui transmetre trames a múltiples estacions (STA) en paral·lel, cosa que pot augmentar substancialment el rendiment de la xarxa, així com mitigar les altes taxes de col·lisió. D'altra banda, els avenços recents en investigació sobre la transmissió full-duplex (FD) obren una altra línia per millorar el rendiment de les xarxes WLAN amb molts usuaris. Transmissions full-duplex en xarxes sense fils trenquen la suposició que diu que els nodes no poden transmetre i rebre simultàniament usant la mateixa freqüència. Aquest emocionant avenç no només promet un augment de capacitat en permetre la transmissió i recepció simultània, sinó que també podria portar canvis revolucionaris en el disseny MAC sacsejant els fonaments del mecanisme Carrier Sense Multiple Access amb prevenció de col·lisions (CSMA/CA). Així, el CSMA/CA pot arribar a ser obsolet i ser reemplaçat per un sistema de detecció de col·lisions gràcies a la capacitat de transmissió i recepció simultània dels nodes que suportin full-duplex. No obstant això, aquestes dues línies d'avenços PHY (és a dir, MU-MIMO i FD) no es tradueixen directament en guanys de rendiment útils a la capa MAC (per exemple, l'augment de rendiment). Per tal de tenir beneficis per fer servir MU-MIMO i FD, es necessita adaptar els actuals protocols MAC. En aquesta tesi, primer examinem les propostes de protocols MAC existents a la literatura i, a continuació, mostrem els nostres esforços en la introducció de les adaptacions necessàries per donar suport MAC MU-MIMO a l'enllaç descendent i a l'enllaç ascendent per separat. Després d'això, combinem les adaptacions per a l'enllaç descendent i ascendent en un protocol MU-MIMO MAC unificat i avaluem el seu rendiment tant en condicions saturades com no saturades. A continuació, anem a modelar i avaluar el funcionament del nou IEEE 802.11ac MAC, i els comparem amb les nostres propostes en una xarxa mallada sense fils (xarxa back-haul). A continuació, es proposa un MAC que suporta full-duplex (FD+) per millorar les prestacions dels sistemes sense fils, on analíticament modelem transmissions FD i investiguem quins guanys es poden aconseguir a la capa MAC. Finalment, presentem les conclusions del nostre treball i plantegem les direccions futures en aquest camp de recerca.

Download or read book Distributed MAC Protocol for Full duplex Wireless Networks written by Hassan Malik and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wireless Algorithms Systems and Applications written by Zhe Liu and published by Springer Nature. This book was released on 2021-09-08 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three-volume set constitutes the proceedings of the 16th International Conference on Wireless Algorithms, Systems, and Applications, WASA 2021, which was held during June 25-27, 2021, in Nanjing, China.The 103 full and 57 short papers presented in these proceedings were carefully reviewed and selected from 315 submissions. Part III of the set includes the papers of the contributors that took part in the workshops co-located with the conference.The following topics are covered in the volume: network protocols, signal processing, wireless telecommunication systems, routing algorithms, cryptography, local area networks, and others.

Download or read book Advances in VLSI Communication and Signal Processing written by Debashis Dutta and published by Springer Nature. This book was released on 2019-12-03 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select proceedings of the International Conference on VLSI, Communication and Signal processing (VCAS 2018). It looks at latest research findings in VLSI design and applications. The book covers a wide range of topics in electronics and communication engineering, especially in the area of microelectronics and VLSI design, communication systems and networks, and image and signal processing. The contents of this book will be useful to researchers and professionals alike.

Download or read book 5G Mobile Communications written by Wei Xiang and published by Springer. This book was released on 2016-10-13 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the emerging technologies for next-generation 5G mobile communications, with insights into the long-term future of 5G. Written by international leading experts on the subject, this contributed volume covers a wide range of technologies, research results, and networking methods. Key enabling technologies for 5G systems include, but are not limited to, millimeter-wave communications, massive MIMO technology and non-orthogonal multiple access. 5G will herald an even greater rise in the prominence of mobile access based upon both human-centric and machine-centric networks. Compared with existing 4G communications systems, unprecedented numbers of smart and heterogeneous wireless devices will be accessing future 5G mobile systems. As a result, a new paradigm shift is required to deal with challenges on explosively growing requirements in mobile data traffic volume (1000x), number of connected devices (10–100x), typical end-user data rate (10–100x), and device/network lifetime (10x). Achieving these ambitious goals calls for revolutionary candidate technologies in future 5G mobile systems. Designed for researchers and professionals involved with networks and communication systems, 5G Mobile Communications is a straightforward, easy-to-read analysis of the possibilities of 5G systems.

Download or read book Cooperative Multi channel MAC Protocols for Wireless Ad Hoc Networks written by Yuhan Moon and published by . This book was released on 2010 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, many wireless networks are single-channel systems. However, as the interest in wireless services increases, the contention by nodes to occupy the medium is more intense and interference worsens. One direction with the potential to increase system throughput is multi-channel systems. Multi-channel systems have been shown to reduce collisions and increase concurrency thus producing better bandwidth usage. However, the well-known hidden- and exposed-terminal problems inherited from single-channel systems remain, and a new channel selection problem is introduced. In this dissertation, Multi-channel medium access control (MAC) protocols are proposed for mobile ad hoc networks (MANETs) for nodes equipped with a single half-duplex transceiver, using more sophisticated physical layer technologies. These include code division multiple access (CDMA), orthogonal frequency division multiple access (OFDMA), and diversity. CDMA increases channel reuse, while OFDMA enables communication by multiple users in parallel. There is a challenge to using each technology in MANETs, where there is no fixed infrastructure or centralized control. CDMA suffers from the near-far problem, while OFDMA requires channel synchronization to decode the signal. As a result CDMA and OFDMA are not yet widely used. Cooperative (diversity) mechanisms provide vital information to facilitate communication set-up between source-destination node pairs and help overcome limitations of physical layer technologies in MANETs. In this dissertation, the Cooperative CDMA-based Multi-channel MAC (CCM-MAC) protocol uses CDMA to enable concurrent transmissions on each channel. The Power-controlled CDMA-based Multi-channel MAC (PCC-MAC) protocol uses transmission power control at each node and mitigates collisions of control packets on the control channel by using different sizes of the spreading factor to have different processing gains for the control signals. The Cooperative Dual-access Multi-channel MAC (CDM-MAC) protocol combines the use of OFDMA and CDMA and minimizes channel interference by a resolvable balanced incomplete block design (BIBD). In each protocol, cooperating nodes help reduce the incidence of the multi-channel hidden- and exposed-terminal and help address the near-far problem of CDMA by supplying information. Simulation results show that each of the proposed protocols achieve significantly better system performance when compared to IEEE 802.11, other multi-channel protocols, and another protocol CDMA-based.

Download or read book MAC Protocols for Cyber Physical Systems written by Feng Xia and published by Springer. This book was released on 2015-06-04 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a literature review of various wireless MAC protocols and techniques for achieving real-time and reliable communications in the context of cyber-physical systems (CPS). The evaluation analysis of IEEE 802.15.4 for CPS therein will give insights into configuration and optimization of critical design parameters of MAC protocols. In addition, this book also presents the design and evaluation of an adaptive MAC protocol for medical CPS, which exemplifies how to facilitate real-time and reliable communications in CPS by exploiting IEEE 802.15.4 based MAC protocols. This book will be of interest to researchers, practitioners, and students to better understand the QoS requirements of CPS, especially for healthcare applications.

Download or read book Integrated Data and Energy Transfer in Wireless Networks written by Jie Hu and published by Springer Nature. This book was released on with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 5G Green Mobile Communication Networks written by Xiaohu Ge and published by Springer. This book was released on 2019-05-17 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the modeling, optimization, and applications of 5G green mobile communication networks, aimed at improving energy efficiency and spectrum utilization in 5G systems. It offers a balance between theoretical analysis and engineering practice, providing in-depth studies of a number of major topics, such as energy consumption models, optimization, system design, implementation, and performance evaluation. It also discusses four aspects of green communication in detail: cellular networks, resource management, wireless transmissions and multi-media communications. Further, this unique book comprehensively and systematically discusses green optimization in wireless mobile communications. As such it is a valuable resource for researchers, engineers, and graduate students in various fields, including telecommunications engineering, electrical and electronic engineering, and computer engineering, particularly those interested in green communications.

Download or read book Topics on Ad Hoc Wireless Network Design written by Hazer Inaltekin and published by . This book was released on 2006 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Smart Antennas and Electromagnetic Signal Processing in Advanced Wireless Technology written by Paul R.P. Hoole and published by CRC Press. This book was released on 2022-09-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book addresses the current demand for a scientific approach to advanced wireless technology and its future developments. It gives a clear presentation of both antennas and adaptive signal processing which is what makes antennas powerful, maneuverable and necessary for advanced wireless technology. The book presents electromagnetic signal processing techniques that both control the antenna beam and track the moving station, which is required for effective, fast, dynamic beamforming. The first part of the book presents a comprehensive description and analysis of basic antenna theory, starting from short dipole antennas to array antennas. This section also includes important concepts related to antenna parameters, electromagnetic wave propagation, the Friis equation, the radar equation and wave reflection and transmission through media. The second part of the book focuses on smart antennas, commencing from a look at the traditional approach to beamforming before getting into the details of smart antennas. Complete derivation and description of the techniques for electromagnetic field signal processing techniques for adaptive beamforming are also presented. Artificial Intelligence (AI) driven beamforming is presented using computationally fast and low-memory demanding technique for AI beamforming is presented with the different excitation functions available. A novel method for fast, low memory and accurate, maneuverable single beam generation is presented, as well as other methods for beamforming with fewer elements along with a simple method for tracking the mobile antenna and station. In this section, for completeness, the use of antenna signal processing for synthetic aperture techniques for imaging is also presented, specifically the Inverse Synthetic Aperture Imaging technique. The third part of the book presents technological aspects of advanced wireless technology, including the 5G wireless system and the various devices needed to construct it. While the books’ main emphasis is theoretical understanding and design, it includes applications, and legal matters are also presented.

Download or read book Full Duplex Communications for Future Wireless Networks written by Hirley Alves and published by Springer Nature. This book was released on 2020-04-21 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the multidisciplinary state-of-the-art of full-duplex wireless communications and applications. Moreover, this book contributes with an overview of the fundamentals of full-duplex communications, and introduces the most recent advances in self-interference cancellation from antenna design to digital domain. Moreover, the reader will discover analytical and empirical models to deal with residual self-interference and to assess its effects in various scenarios and applications. Therefore, this is a highly informative and carefully presented book by the leading scientists in the area, providing a comprehensive overview of full-duplex technology from the perspective of various researchers, and research groups worldwide. This book is designed for researchers and professionals working in wireless communications and engineers willing to understand the challenges and solutions full-duplex communication so to implement a full-duplex system.

Download or read book Full Duplex Communications and Networks written by Lingyang Song and published by Cambridge University Press. This book was released on 2017-03-02 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn about the key technologies and understand the state of the art in research for full-duplex communication networks and systems with this comprehensive and interdisciplinary guide. Incorporating physical, MAC, network, and application layer perspectives, it explains the fundamental theories on which full-duplex communications are built, and lays out the techniques needed for network design, analysis and optimization. Techniques covered in detail include self-interference cancellation and signal processing algorithms, physical layer algorithms, methods for efficient resource allocation, and game theory. Potential applications and networking schemes are discussed, including full-duplex cognitive radio networks, cooperative networks, and heterogeneous networks. The first book to focus exclusively on full-duplex communications, this is an indispensable reference for both researchers and practitioners designing the next generation of wireless networks.

Download or read book On Full Duplex Wireless Neworks written by Mhd Omar Alkadri and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finally, we present a cross-layer aided routing protocol, termed as X-FDR, for multi-hop FD wireless networks. X-FDR exploits a Physical (PHY) layer model capturing imperfection of SI cancellation. At the medium access control (MAC) layer, X-FDR adopts an optimized MAC protocol which implements a power control mechanism without creating the hidden terminal problem. X-FDR exploits the unique characteristics of FD technology at the network layer to construct energy-efficient and low latency routes in the network.

Download or read book Protocol Design and Analysis for Cooperative Wireless Networks written by Wei Song and published by Springer. This book was released on 2016-11-03 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the design and analysis of protocols for cooperative wireless networks, especially at the medium access control (MAC) layer and for crosslayer design between the MAC layer and the physical layer. It highlights two main points that are often neglected in other books: energy-efficiency and spatial random distribution of wireless devices. Effective methods in stochastic geometry for the design and analysis of wireless networks are also explored. After providing a comprehensive review of existing studies in the literature, the authors point out the challenges that are worth further investigation. Then, they introduce several novel solutions for cooperative wireless network protocols that reduce energy consumption and address spatial random distribution of wireless nodes. For each solution, the book offers a clear system model and problem formulation, details of the proposed cooperative schemes, comprehensive performance analysis, and extensive numerical and simulation results that validate the analysis and examine the performance under various conditions. The last section of this book reveals several potential directions for the research on cooperative wireless networks that deserve future exploration. Researchers, professionals, engineers, and consultants in wireless communication and mobile networks will find this book valuable. It is also helpful for technical staff in mobile network operations, wireless equipment manufacturers, wireless communication standardization bodies, and governmental regulation agencies.

Download or read book Advanced Wireless Sensing Techniques for 5G Networks written by Ashish Bagwari and published by CRC Press. This book was released on 2018-09-21 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book written for students of electronics and communication, students of computer science and communications engineers addresses topics such as Introduction of CRN, Advanced spectrum sensing techniques, Cooperative sensing techniques, Distributed sensing techniques, Issues in advanced sensing techniques, and Applications of 5G Networks. It provides new algorithms, explores recent results, and evaluates the performance of technologies in use in this area. It also provides new research topics and sensing techniques related to 5G networks for researchers.